Question

For the reaction $H_2\left(g\right)+I_2\left(g\right)\rightleftharpoons 2HI\left(g\right)$ The equilibrium constant $K_p$ changes with :

• A. Total pressure
• B. Catalyst
• C. The amounts of $H_2$ and $I_2$ present
• D. Temperature

Answer 1

The correct option is D Temperature

The equilibrium constant does not change at all with changes in concentrations, volume, pressure, presence of catalyst, etc. It changes only with changes in temperature of the system. For endothermic reaction, the value of K increases with increase in temperature and vice versa. For exothermic reaction, the value of K decreases with increase in temperature and vice versa.